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  • Question
  • 1397 x 1397 =?


  • Options
  • A. 1951609
  • B. 1981709
  • C. 18362619
  • D. 2031719
  • E. None of these

  • Correct Answer
  • 1951609 

    Explanation
    1397 x 1397 = (1397)2
    = (1400 - 3)2
    = (1400)2 + (3)2 - (2 x 1400 x 3)
    = 1960000 + 9 - 8400
    = 1960009 - 8400
    = 1951609.

  • Numbers problems


    Search Results


    • 1. The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number?

    • Options
    • A. 240
    • B. 270
    • C. 295
    • D. 360
    • Discuss
    • 2. 5358 x 51 =?

    • Options
    • A. 273258
    • B. 273268
    • C. 273348
    • D. 273358
    • Discuss
    • 3. 8988 ÷ 8 ÷ 4 =?

    • Options
    • A. 4494
    • B. 561.75
    • C. 2247
    • D. 280.875
    • E. None of these
    • Discuss
    • 4. The slant height of a right circular cone is 10 m and its height is 8 m. Find the area of its curved surface.

    • Options
    • A. 30Π m2
    • B. 40Π m2
    • C. 60Π m2
    • D. 80Π m2
    • Discuss
    • 5. A metallic sheet is of rectangular shape with dimensions 48 m x 36 m. From each of its corners, a square is cut off so as to make an open box. If the length of the square is 8 m, the volume of the box (in m3) is:

    • Options
    • A. 4830
    • B. 5120
    • C. 6420
    • D. 8960
    • Discuss
    • 6. {(476 + 424)2 - 4 x 476 x 424} =?

    • Options
    • A. 2906
    • B. 3116
    • C. 2704
    • D. 2904
    • E. None of these
    • Discuss
    • 7. If (64)2 - (36)2 = 20 x x, then x =?

    • Options
    • A. 70
    • B. 120
    • C. 180
    • D. 140
    • E. None of these
    • Discuss
    • 8. If n is a natural number, then (6n2 + 6n) is always divisible by:

    • Options
    • A. 6 only
    • B. 6 and 12 both
    • C. 12 only
    • D. by 18 only
    • Discuss
    • 9. Which of the following numbers will completely divide (4915 - 1)?

    • Options
    • A. 8
    • B. 14
    • C. 46
    • D. 50
    • Discuss
    • 10. The unit digit in the product (784 x 618 x 917 x 463) is:

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 5
    • Discuss


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