Which number comes next in the sequence
1 3 8 13 21 ?
17
1
3 = one (3 letters)
8 = three (5 letters) + one (3 letters)
13 = Eight (5 letters) + three (5 letters) + one (3 letters)
21 = Thirteen (8 letters) + Eight (5 letters) + three (5 letters) + one (3 letters)
17 = twentyOne (9 letters) + Thirteen(8 letters)
Which number will replace the "?" and complete the sequence?
1 1 2 4 3 9 4 61 5 52 6 63 7 ?
94
Logic Used: The numbers are in pair and every second number is the reverse of 1st number.
1 -> 1
2 -> 4
3 -> 9
4 -> 61 (Reverse of 16)
5 -> 52 (Reverse of 25)
6 -> 63 (Reverse of 36)
7 ->94 (Reverse of 49)
which number replaces the question mark?
30
Explanation:
As you can see the lower number rows are always bigger than upper row ones with the difference going up by 3 with every step
34 - 32 = 2
32 - 27 = 5 (difference going up by 3 from last difference)
56 - 48 = 8 (difference going up by 3 from last difference)
? - 19 = 11 (difference going up by 3 from last difference)
so ? = 30
Continue the sequence by choosing one of the options instead of the question mark.
B.
In every line and column, there are bicycles where 2 of them are facing left, and 1 is facing right, 2 with 2 pedals, and 1 with 12 with a steering wheel and 1 without.
H, Be, F, S, Mn, Kr, In, Gd, Tl, ?
What's the next in the series?
Fm.
These are the chemical elements whose atomic numbers are perfect squares.
1, 4, 9, 16, 25, 36, 49, 64, 81, 100.
In which direction should the missing arrow point ?
South
The series: south, east, north, south, west, east spirals clockwise from the top left-hand corner.
What Come next in sequence
1 , 4 , 5 , 6 , 7 , 9 , 11 ?
100 (The next number that doesn't contain a 'T' in the spelling).
What number represented by question mark
39
Working from top to bottom, double each number and subtract 1, then 2, then 3 etc.
What Number Should Replace The Question Mark In The Circle Below ?
17
It is the sum of the two digits(9 + 8) in opposite quadrant.
Find The Next Number In The Sequence
30 10 15 13 0 16 -15 ?
19
Its a alternate sequence riddle
30 15 0 -15 (-15)
10 13 16 (+3)