Q&A - P4 Math

[Jamesbond]

thanks a lot

[Jamesbond]

Janice age is a multiple of 7. Next year, her age will be a multiple of 4. If janice is less than 40 years old, how old is she now?


Pl help me do this.....donno.... :yikes:

[Jamesbond]

Shanthi is reading her favourite book. She realizes the product of the two page numbers facing each other is 420. what are the page numbers that she is reading now?


pl help and explain in detail.....Thanks in advance. :yikes:

[Champion]

Jamesbond:

Shanthi is reading her favourite book. She realizes the product of the two page numbers facing each other is 420. what are the page numbers that she is reading now?


pl help and explain in detail.....Thanks in advance. :yikes:

Guess & Check Method
Page 20 & 21 - 20 x 21 = 420

[Champion]

Jamesbond:

Janice age is a multiple of 7. Next year, her age will be a multiple of 4. If janice is less than 40 years old, how old is she now?


Pl help me do this.....donno.... :yikes:

Multiples of 4: 4,8,12,16,20,24,28,32.....
Multiples of 7: 7,14,21,28,35,42....

Common multiples of 4 & 7 is 28.
Janice is 28 years old now.

[fightingmom]

Hmm… My steps are

1) see which numbers square up to 400 (that is 2020 = 400)
2) since we need consecutive numbers (pages facing each other) , we start with 2120
3) happens 1st try (no 21) was the correct answer

Hope it helps

[small]

Jamesbond:

Janice age is a multiple of 7. Next year, her age will be a multiple of 4. If janice is less than 40 years old, how old is she now?


Pl help me do this.....donno.... :yikes:

Hi,

I think there will be two answers for this question, 7 and 35.

Multiples of 7: 7,14,21,28,35
Next year : 8, 15, 22, 29, 36

[iFirefly]

small:

Jamesbond:

Janice age is a multiple of 7. Next year, her age will be a multiple of 4. If janice is less than 40 years old, how old is she now?


Pl help me do this.....donno.... :yikes:

Hi,

I think there will be two answers for this question, 7 and 35.

Multiples of 7: 7,14,21,28,35
Next year : 8, 15, 22, 29, 36

The multiples of 4 must be (+1) of the multiples of 7 coz of ''next year'' (+1 year).
''Small'', you are right... both 7 & 35 are possible answers.
Usually, such question will state ''more than xx years old and less than xx years old''.
Eg. ''Janice is more than 10 years old and less than 40 years old\".

Multiples of 7 : 7 14 21 28 35
Multiples of 4 : 4 8 12 16 20 24 28 32 36

[Sharmum]

:thankyou: Small,

[small]

Hi Sharmum,


You are welcome, cheers…