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ICSE-VIII-Mathematics

05: Playing with Number Class 8 Maths

with Solutions - page 3
Qstn# D-1 Prvs-QstnNext-Qstn
  • #1
    For what value of digit x, is : (1) × 5 divisible by 3? (1) × 5 divisible by 3?
    Ans : (1) × 5 is divisible by 3
    ⇒ 1 + x + 5 is a multiple of 3
    ⇒ 6 + x = 0, 3, 6, 9
    Since, x is a digit
    x = 0, 3, 6 or 9 (1) × 5 is divisible by 3
    ⇒ 1 + x + 5 is a multiple of 3
    ⇒ 6 + x = 0, 3, 6, 9
    Since, x is a digit
    x = 0, 3, 6 or 9
  • #1-1
    × 5 divisible by 3?
    Ans : × 5 is divisible by 3
    ⇒ 1 + x + 5 is a multiple of 3
    ⇒ 6 + x = 0, 3, 6, 9
    Since, x is a digit
    x = 0, 3, 6 or 9