Verbal Reasoning - Mental Ability Questions

If ' + ' means minus , ' - ' means multiplication , ' ÷ ' means plus , and ' x ' means division , then 15 - 3 + 10 x 5 ÷ 5

L, M, N, O and P are sitting in a line facing east. L and M are sitting together. N is sitting at north end and O is sitting at south end. P is the neighbour of M and N. Who is third from north end?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
CEG, IKM, OQS, ?

Select the related word/letters/number from the given alternatives.
PEON : QRHS : : JOCK : ?

If mathematical operators '-' and '/' are interchanged, then the value of 15 x 4 ÷ 15 - 11 x 33 ÷ 98 is

Introducing a woman, a boy says, "She is the wife of my grandfather's son". How is the woman related to the boy?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
49, 64, ?, 100, 121

Select the related word/letters/numbers from the given alternatives. CURE : DISEASE :: HEAL : ?