Year 3 Maths Challenge Spring 2

Bronze:

If James’ peach doubles in size every 30 seconds, how big will his 8cm peach be in 4 minutes?

Silver:

If a Wonka chocolate bar costs 20p, how many Wonka bars can be bought with £20.00?

Gold:

Estimate how many tortoises there are in this picture. Represent this number as a number, in words, and as a tally.

Platinum:

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  1. BRONZE:

    30 sec ➡ doubles

    8cm

    30 sec➡ 16cm.

    1 min ➡ 32cm

    1-5 min ➡ 64cm

    2 min ➡ 128cm

    2.5 min ➡ 256cm

    3 min ➡ 512cm

    3.5 ➡ 1024cm

    4 min ➡ 2048cm.

    It becomes 2048cm big

    SILVER:

    20p

    100 bars you can buy with €20,00

    20 / 2000 = 100

    GOLD:

    My estimate is there are 40 tortoises in the picture

    In word (FORTY)

    _________________________
    | |||||||||||||||||||||||||||||||||||||||| tortoises
    | ||| pictures on wall
    | | man
    | | door

    PLATINUM:

    Centipede 100 legs

    Human 2 legs

    Total is a 102

    Need 34 more legs

    There is going to be 5 insects

    And 2 more humans are needed

    1 centipede = 100 legs

    3 humans = 6 legs

    5 insects = 30 legs

    100 + 6 + 30 = 136

    726 legs

    6 x 100 = 600 (centipedes)

    20 x 6 = 120

    3 x 2 = 6 humans

    600 + 120 + 6 = 726 legs

    Total is 726 legs

    1254 legs needed

    10 x 100 = 1000 centepide legs

    30 x 6 = 180 insects legs

    37 x 2 = 74 humans legs

    1000 + 180 + 74 = 1254

    Total is 1254 legs

  3. Bronze
    4 mins = 240 secs
    240 / 30 = 8
    1.8×2= 16
    2.16×2= 32
    3.32×2= 64
    4.64×2= 128
    5.128×2= 256
    6.256×2= 1024
    7.1024×2= 2048
    The answer is 2048.

    Silver
    £1 will give you 5 wonka bars
    5X20= 100

    Gold
    I predict there are approximately 58 tortoises. Fifty Eight
    11111 11111 11111 11111 11111 11111 11111 11111 11111 11111 11111 111

    Platinum
    1.136
    1 centipede
    5 insects
    3 humans.
    2.726
    7 centipedes
    4 insects
    1 human
    3.1254
    12 centipedes
    6 insects
    9 humans.

  7. Bronze:
    60×4 = 240cm.
    Silver:
    You can buy 5 wonka bars for £1 so you do
    5×20 = 100.
    Gold:
    I think there are 40.
    Platinum:
    1 centipede
    5 insects
    3 humans.

  12. Bronze
    1.240cm/2 metres and 40cm
    Silver
    1.2000
    2000 shared by 20=100
    20×100=2000
    Gold
    1.I think they are 54 tortoises.
    Platinum
    1.1 centipede,5 insects and 3 humans=136.
    2.1 centipede and 6 insects=136.
    3.7 centipedes,3 insects and 4 humans.
    4.12 centipedes,8 insects and 2 humans.

  14. Bronze:
    60×4 = 240cm.

    Silver:
    You can buy 5 wonka bars for £1 so you do
    5×20 = 100.

    Gold:
    I think there are 40.

    Platinum:
    1 centipede
    5 insects
    3 humans.

  18. Bronze:
    1 minute=60 seconds
    4 minutes=60×4=240 seconds.
    8cm-16cm
    16cm-32cm
    32cm-64cm
    64cm-128cm
    128cm-256cm
    256cm-512cm
    512cm-1,024
    1024-2,048
    The answer is 2,048.

    silver:
    100p=£1.00
    20px5=100p=£1.00
    20X100=2000
    2000p=£20.00
    The answer is 100p because 100X20+2000
    100 wonka bars can be brought.

    Gold:
    100,one hundred,1111 1111 1111 1111 1111 1111 1111 1111 1111 1111
    1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111
    1111 1111.

    Platinum:
    There might be 1 centipede=100 legs,5 insects=30 legs,3 humans=6 legs.
    100+30+6=136.

    If there was 726 legs there could be 7 centipedes=700 legs,1 insect=6 legs,10 humans=20 legs
    700+6+20=726.

    If there was 1,254 legs there could be 12 centipedes=1200 legs,8
    insects=48 legs,3 humans=6 legs
    1200+48+6=1,254.

  20. Bronze
    1.it will be 1.2m/120cm
    Silver
    2. He will be able to buy 2000
    Gold
    3.i estimate there are 78
    Platinum
    4.1 centipede 4 insects 2 humans

  24. Bronze

    1.240cm/2 metres and 40cm

    Silver

    1.2000
    2000 shared by 20=100
    20×100=2000

    Gold

    1.I think they are 54 tortoises.

    Platinum

    1.1 centipede,5 insects and 3 humans=136.
    2.1 centipede and 6 insects=136.
    3.7 centipedes,3 insects and 4 humans.
    4.12 centipedes,8 insects and 2 humans.