Question

Which of the following are equal to 81- 29?

• A. 70 - 18
• B. 69 - 17
• C. 91 - 39
• D. 71 - 23

Answer 1

Answer: (A), (B), (C)

The correct options are
A 70 - 18
B 69 - 17
C 91 - 39

$711\text{/}8\text{/}1\underset{–}{29}-\underset{–}{52}$

i.e., $81-29=52$

We need to find the options which equal 52.

$610\text{/}7\text{/}0\underset{–}{18}-\underset{–}{52}$

i.e., $69-17=52$

$811\text{/}9\text{/}1\underset{–}{39}-\underset{–}{52}$

i.e., $91-39=52$

$611\text{/}7\text{/}1\underset{–}{23}-\underset{–}{48}$

i.e., $71-23=48$

Thus, except the option 71 - 23, all the other options equal 52 and hence, are correct.