Q31 of 48 Page 408

Fill in the blanks to make the statements true.

If A × 3 = 1A, then A = …………… .

Adding the corresponding places to the number we have 3A = 10 + A


⇒ 2A = 10


⇒ A = 5.


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29

Fill in the blanks to make the statements true.

A number is divisible by 11 if the differences between the sum of digits at its odd places and that of digits at the even places is either 0 or divisible by ………….. .

 30

Fill in the blanks to make the statements true.

If a 3-digit number abc is divisible by 11, then …………. Is either 0 or multiple of 11.

 32

Fill in the blanks to make the statements true.

If B × B = AB, then either A = 2, B = 5 or A = ……………., B = ………… .

 33

Fill in the blanks to make the statements true.

If the digit 1 is placed after a 2-digit number whose tens is t and ones digit is u, the new number is …………… .