Question
Which of the following numbers is divisible by
22?Solution
A number is divisible by 22 if it is divisible by both 2 and 11. Divisibility by 2: A number is divisible by 2 if its last digit is even. Divisibility by 11: A number is divisible by 11 if the alternating sum and difference of its digits is divisible by 11. According to the option-2 Divisible by 2 (last digit 2 is even). Divisible by 11Â S=8-9+3-0+0-2 S=(8+3+0)-(9+0+2) S=11-11 = 0 (alternating sum: 0). Divisible by 22.
The average of three numbers a, b and c is 2 more than c. The average of a and b is 48. If d is 10 less than c, then the average of c and d is:
If the sum of three numbers is zero, then which of the options below will always be equal to the value of the sum of the cubes of those numbers?
If  x = 19 , find x 5 - 20  x 4 + 20  x 3 - 20x 2 + 20x  - 20 = ?
Given that x8-34x4+1=0, x>0. What is the value of (x3+ x-3)?
If x2a = y2b =z2c ≠ 0 and x2 = yz, then the value of (ab + bc + ca) /bc is :
when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?
Given that x = 80, y = -35 and z = -45, Determine the value of [(x³ + y³ + z³)/10³]
22% of ‘x’ is equal to 66% of ‘y’, then find the value of x: y.
If, 4x + y = 10, and 2xy = 8, and 4x > y, then find the value of 64x³ – y³.
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