# Identifying the missing part of the calculation

The IQ question is,

(39+56)/60% = ?*3

Complete the equation by correctly identifying the missing part of the calculation from the list of options below.

where in the book answer is stated as 133/7.

I calculated the answer using base 10 but it doesn't produce the given answer. Any insight?

This was extracted from ADVANCED IQ TESTS by PHILIP CARTER

So

(39+56) = 95; and 95/60% = 95/0.6 = 158.333 repeated.

Then,

You have 3x = 158.333333 = 475/3, so x = 158.33333 /3 = 475/9.

However,

Notice that 133/7 = 19. There’s a typo in the book, since 19 x 3 = 57, and (39+56)x60% = 57. The true question should have been (to get their answer): (39+56)x60% = ?x3.

• This real solution demonstrates a general-purpose intelligence well beyond the calculation skill that the book seems intent to measure.
– humn
Jul 9, 2020 at 5:48
• Thank you, @humn! Too kind :) Jul 9, 2020 at 11:14
• Thank you @El-Guest and @humn! Jul 9, 2020 at 16:00