Love For MathCreative Math Education

DIY Challenge 1: Pay with the coins

You have coins of ₹1, ₹2, ₹3 and ₹5. You need to pay a total amount of ₹35.

You should use a total of exactly 10 coins.

How many ways can you find to do so?

What students worked out11

  • Student 7

    5 coins of 5 and 5 coins of 2

    • Karanteacher

      Can you find more ways?

      • Student 40

        Ok sir

  • Student 2

    way 1:-

  • Student 2

    way 1:-
    5 coins of 5
    5 coins of 2
    way 2:-
    4 coins of 5
    4 coins of 3
    1 coin of 2
    1 coin of 1
    way 3:-
    3 coins of 5
    6 coins of 3
    1 coin of 2
    THERE ARE A LOT OF MORE WAYS

  • Student 3

    1×0=0
    2×3=6
    3×3=9
    5×4=20
    ——
    total 35
    ——-
    2×5=10
    5×5=25
    ——–
    total 35
    ———

    1×2=2
    2×1=2
    3×2=6
    5×5=25
    ——–
    total 35
    ——–

    1×3=3
    2×1=5
    5×6=30
    ——–
    total 35

    • Student 3

      1×0=0
      2×1=2
      3×6=18
      5×3=15
      ======
      total 35

  • Student 10

    5 coins of 5
    2 coins of 2

    I’ll share some more different ways in the session.

  • Student 7

    3 coins of 2 = ₹6 = 3 coins
    3 coins of 3 = ₹9 = 6+9 = ₹15 = 3+3 coins = 6 coins
    4 coins of 5 = ₹20 = 6+9+20=25= 3+3+4 coins = 10 coins
    objective complete

  • Student 1

    5 coins of 5 =25 5 coins of 2 =10 & 10+25=35

  • Student 4

    3 coins of 2 = ₹6 = 3 coins used
    3 coins of 3 = ₹9 = 6+9 = ₹15 = 6 coins used
    4 coins of 5 = ₹20 = 6+9+20 = 25 = 10 coins used