Page 73 - ICSE Math 8

PRACTICE TIME

1. If 61x52 is a multiple of 9, where x is a digit, then what is the value of x?
2. If 7y4 is a multiple of 4, where y is a digit, then what is the value of y?
3. Find X in the addition. 3 8 X

+ 4 X 2
8 3 7
5C
4. In the following problem, replace the letters of English alphabet by 9 4AB
digits (two or more letters may have the same value) to complete the –DE
procedure of division. 3F
5. For a 3-digit number abc, what will be the quotient if abc – cba is divided by 11? –GH
6. When is a 3-digit number abc divisible by 6? 0
7. Explain whether 95 is divisible by 3 or not.
8. Which of these—675, 931, 429, 283 and 720 is/are divisible by 9?

THINK SMART

1. In the 4 × 5 array given alongside, place the numbers from 1 to 20 (without 7 10
repetition) so that a sequence (chain of numbers) is obtained from 1 to 20. You
can move to the adjacent cell to the left, right, up or down but not diagonally.
The positions of the numbers that already exist are fixed.
2 17
2. Fill in the circles with the correct digits.

2 5
× 4 3 9

4 5 ×

1 0 6 0 × ×

4 9 8

61