Explanation:
(18/3)×(35/7)=30
(28/4)×(40/5)=56
(36/9)×(24/6)=16.
Explanation:
Starting from 2, compute the factorial and divide by 2.
x[n]=(n+1)!/2
Explanation:
The right answer is 12.
7+3-5=5
11+4-7=8
9+6-3=12.
Explanation:
Multiply by 2 and 1.5 alternately to get the following numbers. This sequence can be seen as two alternating sequences, where the elements of each one can be obtained by multiplying the previous one by 3.
Explanation:
3×5+7×2=29
2×11+9×2=40
4×7+1×2=30.
Explanation:
5×3-1=14
12×3-1=35
9×3-1=26
(multiply by three every element on the top and then subtract 1 to get the opposite aspect on the bottom).
Explanation:
From the first sequence number, divide by two and add four alternately to get the following series number.
