Q&A - P4 Math

[small]

Sharmum:

Hi,


May i know if theres a shorter method?

:?

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Hi Sharmum,

Please refer to attached pic, HTH.

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[Jamesbond]

A set of two blouses costs $41. Ivy found out that she could only buy 4 blouses but not more than 6 blouses with the amount of money she had. What is the possible amount of money she had?

1) $50 2) $90
3) $150 4) $250

Answer is option 2.

Pl explain me this in detailllll....VVVVV urgent......I donno..... :yikes:

[Champion]

Jamesbond:

A set of two blouses costs $41. Ivy found out that she could only buy 4 blouses but not more than 6 blouses with the amount of money she had. What is the possible amount of money she had?

1) $50 2) $90
3) $150 4) $250

Answer is option 2.

Pl explain me this in detailllll....VVVVV urgent......I donno..... :yikes:

P4 dd1 answer: 2 blouses $41 then 4 blouses will be $41 x 2 = $84. Therefore $84 nearest is $90; Answer (2).

[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