Question
Four number-pairs have been given, out of which three
are alike in some manner and one is different. Select the number-pair that is different.Solution
12 – 36 → 12 X (1 + 2) = 12 X 3 = 36 24 – 144 → 24 X (2 + 4) = 24 X 6 = 144 19 – 189 → 19 X (1 + 9) = 19 X 10 = 190 32 – 160 → 32 X (3 + 2) = 32 X 5 = 160
The following table shows the marks obtained by five students in three subjects:
How many 4-digit even numbers can be formed using digits 1 to 6 without repetition?
120Â Â 124Â Â 151Â Â 167Â Â Â 292Â Â Â ?
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