Select the option in which the numbers are related in the same way as the numbers of the following sets.
(46, 23, 25), (16, 2, 10)
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (90, 15, 21)
In each set the first number is a multiple of the second, so divide the first number by the second and compare the result with the third number.
(46, 23, 25): \(46\div23=2\), and \(23+2=25\)
(16, 2, 10): \(16\div2=8\), and \(2+8=10\)
So the rule is: third number = second number + (first number ÷ second number)
(90, 15, 21): \(90\div15=6\), and \(15+6=21\), which fits
(100, 20, 27): \(100\div20=5\), and \(20+5=25\), not 27
(78, 13, 21): \(78\div13=6\), and \(13+6=19\), not 21
(150, 30, 45): \(150\div30=5\), and \(30+5=35\), not 45
So the set related in the same way is (90, 15, 21).