Categories:
ICSE

Question 1.

In a 2-digit number, sum of digits is 7. If the difference of 2 digit number and number obtained by reversing the digits is 9, then find the number.

Solution:

Question 2.

In a 3 digit number, the difference of hundred’s digit and unit’s digit is 5. Find the quotient when the difference of 3-digit number and number obtained by reversing the digits is divided by 9.

Solution:

Question 3.

Without actual calculation, write the quotient when sum of 3 digit numbers 567, 675 and 756 is divided by

(i) 111

(ii) 18

(iii) 37

(iv) 3

Solution:

Question 4.

Find the values of the letters in each of the following and give reasons for the steps involved:

Solution:

Question 5.

If 923×783 is divisible by 11, what is the value of digit x?

Solution:

Question 6.

Check the divisibility of following numbers by 2, 3, 9 and 11:

(i) 76543

(ii) 65432

(iii) 98765436

(iv) 234567

Solution:

Question 7.

Check the divisibility of the following numbers by 5 or 10:

(i) 23565

(ii) 45270

Solution:

Question 8.

Check the divisibility of the following numbers by 4 or 8:

(i) 47596

(ii) 593024

Solution:

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