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Number Knowledge

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  • List 4 factors of 20.
    1, 2, 4, 5, 10, 20
  • How many 9’s are there between 1 and 100?
    20
  • 0.75 as a fraction?
    3/4
  • I am four times as old as my daughter. In 20 years’ time I shall be twice as old as her. How old are we now?
    I am 40 and my daughter is 10
  • Ms. Smyth has 4 daughters. Each of his daughters has a brother. How many children does Ms. Smyth have?
    5
  • 25% as a fraction is
    0.25
  • 19 is a prime number?
    Yes
  • What is half of 2 plus 2?
    3
  • I am a number with a couple of friends, quarter a dozen, and you'll find me again. What number am I?
    3
  • 50% as a fraction is?
    0.5
  • People can feel me but never touch me, I can fly your kite or sail your ship. What am I?
    Wind
  • Multiply this number with any other number and you will always get the same answer. What’s the number?
    0
  • There are seven apples and you take away three of them. How many apples do you have?
    3
  • I appear twice in the morning and twice in the evening. But I only appear once at night. What am I?
    Letter N
  • 56 is a prime number?
    No
  • What is the next number in the series: 7645, 5764, 4576, ...?
    3456
  • In 1990, a person is 15 years old. What year was the person born?
    1975