1
$\begingroup$

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

Improve this question
$\endgroup$
1
4
$\begingroup$

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.

Improve this answer
$\endgroup$
3
  • 2
    $\begingroup$ This real solution demonstrates a general-purpose intelligence well beyond the calculation skill that the book seems intent to measure. $\endgroup$
    – humn
    Jul 9 '20 at 5:48
  • $\begingroup$ Thank you, @humn! Too kind :) $\endgroup$
    – El-Guest
    Jul 9 '20 at 11:14
  • $\begingroup$ Thank you @El-Guest and @humn! $\endgroup$
    – Lakshitha Wisumperuma
    Jul 9 '20 at 16:00

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.