A LOGIC puzzle, which stumps adults but can be worked out in twenty seconds by kids

The brainteaser is originally from a primary school test - and youngsters can solve it in 20 seconds or less, according to reports.

The puzzle forms part of an admissions test, determining which elementary school in Hong Kong children will attend.

It shows a picture of ‘parking spaces’. The numbers 16, 06, 68, 88 are in the boxes, but a car covers the other figure.

The reason kids can crack it but adults find it more difficult, apparently lies in the way grown ups perceive it to involve complex maths - but children think more simply.

So who can tell us the answer to missing number

let me think, am coming

89 is the missing number

by guessing or by calculation?

87

The numbers are serial. To get the missing number, you have to view the numbers in an opposite position.

adeememman:
by guessing or by calculation?

by calculation of course, it follows a particular trend

86, (87), 88, 89, 90, 91