Question
Three of the following four are alike in a certain way
and thus form a group. Which is the one that does NOT belong to that group? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding / subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1and 3 is not allowed)Solution
14 x 9 = 126 31 x 9 = 279 25 x 9 = 225 12 x 9 = 108
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900 Â Â Â 90Â Â Â 18Â Â Â ? Â Â Â Â 2.16Â Â Â Â 1.08
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5 6 14 45 ? 925
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138, 140, 152, 174, ?, 248
11, ? 220,  660, 1320,  1320Â
114, 134, 174, 254, 414, ?Â
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...What should come in place of (?) question mark in the following number series.
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7, 8, 18, 57, 232, ?
