Question
Find the digit which will come at the unit place after
solving the following expression (769 × 394 × 942)Solution
Unit digit of 769 = 7(4 x 17 + 1) = 1 × 7 = 1 × 7 = 7 Unit digit of 394 = 3(4 x 23 + 2) = 1 × 32 = 1 × 9 = 9 Unit digit of 942 = 9(4 x 10 + 2) = 1 × 92 = 1 × 81 = 1 × 1 = 1 Unit digit of (7 × 3 × 9) = 7 × 9 × 1 = 63 or unit digit = 3
More No. System Questions
Given that x8-34x4+1=0, x>0. What is the value of (x3+ x-3)?
If (54√2 x³ +24√3 y³)÷(√18 x + √12 y) = Ax² + By² + Cxy, then what is the value of A² - (B²...
If (x 2 = 10x – 25), then find the value of [x³ + (x⁴/25)][7 - x³]
(m - 4) 2 + (n + 5) 2 + (p - 3) 2 = 0, then find the value of 2m + 3n - p.
If x + y + z = 4, xyz = 6 & x2 + y2 + z2 = 8 then find the value of x3 + y3 + z3.
-Constable/1722232657-32.JPG)
- If p = 28 - q - r and pq + r(p + q) = 231, then find the value of (p² + q² + r²).
If (7x + 5y) = 206 and 3x:2y = 27:16, then find the value of (x² + 2y²).
Solve: 5 – 3x > 2x + 10
Relevant for Exams:
