Challenger App

Refer to the following number series and answer the question that follows (all numbers are single-digit numbers only and counting to be done from left to right only).

(Left) 4 4 5 1 4 6 2 1 9 3 3 7 9 3 7 3 4 6 5 7 7 9 6 (Right)

How many such even digits are there, each of which is immediately preceded by an even digit and also immediately followed by an even digit?

Refer to the following letter series and answer the question:

Y H S D S Y I R A Y E U G I R O A B U B R X M P Q

How many such vowels are there in the series each of which isi mmediately preceded by a consonant and also immediately followed by a consonant?

Each vowel in the word 'EXPLAIN' is changed to the letter following it in the English alphabetical order and each consonant is changed to the letter preceding it in the English alphabetical order. If each letter, thus formed, is arranged in alphabetical order, which letter will be third from the right end?

Study the given number series and answer the question that follows. 26749365195245942371 How many even numbers are immediately preceded by an odd number and immediately followed by a prime number?

Study the given letter series and answer the question that follows.

KIOXJETRULEBACKJMN

How many such vowels are there each of which is immediately followed by atleast two consonants appearing together in the above series?