The word CLANDESTINE has eleven letters: C, L, A, N, D, E, S, T, I, N, E. The rule keeps the third, the middle and the ninth letters in lower case and every other letter in upper case. The third letter is A, the middle of eleven letters is the sixth letter E, and the ninth letter is I, so these three become lower case while the rest stay capital, giving CLaNDeSTiNE.
Applying the rule to CLANDESTINE gives CLaNDeSTiNE.
Three of the following four items are alike in a certain way and can be grouped together. Which item cannot be grouped with the other three?
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?