# Number System Class 6 RS Aggarwal Exe-1F MCQs Goyal Brothers ICSE Maths Solutions

Number System Class 6 RS Aggarwal Exe-1F MCQs Goyal Brothers Prakashan ICSE Foundation Maths Solutions. We provide step by step Solutions of lesson-1 Number System for ICSE Class-6 Foundation RS Aggarwal Mathematics of Goyal Brothers Prakashan . Visit official Website CISCE for detail information about ICSE Board Class-6 Mathematics.

## Number System Class 6 RS Aggarwal Exe-1F MCQs Goyal Brothers Prakashan ICSE Foundation Maths Solutions

 Board ICSE Publications Goyal brothers Prakashan Subject Maths Class 6th Ch-1 Number System Writer RS Aggrawal Book Name Foundation Topics Solution of Exe-1F MCQs Academic Session 2023 – 2024

### Solution of Number System Exe-1F MCQs

Ch-1 Class 6 RS Aggarwal Goyal Brothers Prakashan ICSE Foundation Maths Solutions

Page- 29

#### Exercise- 1F

##### Que-1: The place value of 7 in the numeral 25,79,206 is

(a) 7                  (b) 79,206                  (c) 70,000                     (d) 257

Ans- (c) 70,000

Reason : The number 25,79,206 can be broken down into thousands, hundreds, tens, and ones places, as follows:

2 (millions place)
5 (hundred thousands place)
7 (ten thousands place)
9 (thousands place)
2 (hundreds place)
0 (tens place)
6 (ones place)

So, the place value of 7 in the numeral 25,79,206 is in the ten thousands place.

##### Que-2: The face value of 4 in the numeral 36,43,908 is

(a) 40,0000                  (b) 4                 (c) 364                     (d) 43,908

Ans- (b) 4

Reason : In the numeral 36,43,908, the digit 4 is in the ten thousands place.

So, the face value of 4 in the numeral 36,43,908 is simply 4.

##### Que-3: The difference between the place-value and the face-value of 6 in the numeral 32,53,619 is

(a) 19                  (b) 594                  (c) 613                     (d) 600

Ans- (b) 594

Reason : Place value: 6 is in the hundreds place.
Face value: The digit 6 itself.

Now, we’ll calculate the difference:

Place value of 6 = 6 * 100 = 600

Face value of 6 = 6

Difference = Place value – Face value

Difference = 600 – 6

Difference = 594

So, the difference between the place value and the face value of 6 in the numeral 32,53,619 is 594.

##### Que-4: The smallest counting number is

(a) 0                  (b) 1                  (c) 10                      (d) 11

Ans- (b) 1

Reason : The smallest counting number, also known as the smallest positive integer, is 1. This is because counting typically starts from 1 and progresses onward, with each subsequent number increasing by 1.

##### Que-5: The whole number whose successor is 53,100 is

(a) 53,101                  (b) 53,099                  (c) 53,000                     (d) none of these

Ans- (b) 53,099

Reason : To find the whole number whose successor is 53,100, we simply subtract 1 from 53,100.

53,100 − 1 = 53,099

So, the whole number whose successor is 53,100 is 53,099.

##### Que-6: The difference between the largest number of 3-digits and the smallest number of 3-digits formed by the digits 3,0 and 8 is

(a) 495                  (b) 765                  (c) 522                     (d) 450

Ans- (c) 522

Reason : The largest number formed: 830

The smallest number formed: 308

Now, let’s calculate the difference:

Difference = Largest number−Smallest number

Difference = 830 − 308

Difference=522

So, the difference between the largest number of 3 digits and the smallest number of 3 digits formed by the digits 3, 0, and 8 is 522.

##### Que-7: How many 7 digit number are there in all ?

(a) 90,00,000                  (b) 90,00,001                  (c) 89,99,999                     (d) 10,00,000

###### Ans- (a) 90,00,000

Reason : A 7-digit number can start from 10,00,000 and go up to 99,99,999.

So, the total count of 7-digit numbers is the difference between the highest and lowest 7-digit numbers plus 1 (to include both extremes):

99,99,999 − 1,000,000 + 1  = 99,99,999 − 10,00,000 + 1 = 90,00,000

So, there are 90,00,000 seven-digit numbers in total.

##### Que-8: What comes just before 10,00,000?

(a) 99,999                  (b) 99,99,999                  (c) 9,99,999                     (d) none of these

Ans- (c) 9,99,999

Reason : 10,00,000 − 1 = 9,99,999

So, what comes just before 10,00,000 is 9,99,999.

##### Que-9: The largest number of 4 digits which is exactly divisible by 25 is

(a) 1,000                  (b) 10,000                  (c) 9,950                     (d) 9,975

Ans- (d) 9,975

Reason : Dividing 9,999 by 25:

9999 ÷ 25 = 399.96

So, the largest multiple of 25 that is less than or equal to 9,999 is 25 × 399 = 9,975.

Therefore, the largest number of 4 digits which is exactly divisible by 25 is 9,975.

##### Que-10: The number which when divided by 23 gives 17 as quotient and 19 as remainder, is

(a) 413                  (b) 412                  (c) 411                     (d) none of these

Ans- (d) none of these

Reason : Number = (Divisor × Quotient) + Remainder

Substituting the given values:

Number = (23×17) + 19

Number=391+19

Number=410

So, the correct option is (d) none of these, as the correct answer is 410.

##### Que-11: The sum of the successor and the predecessor of a number is 1326. The number is

(a) 663                  (b) 662                  (c) 664                     (d) 661

Ans- (a) 663

Reason : According to the given condition, the sum of the successor (one more than the number) and the predecessor (one less than the number) of the number x is 1326.

So, we can write the equation as:

(x+1)+(x−1) = 1326

Simplify the equation:

2x = 1326

x = 1326/2​

x = 663

Therefore, the number is 663.

— : end of Number System Class 6 RS Aggarwal Exe-1F MCQs Goyal Brothers Prakashan ICSE Foundation Maths :–