Q&A - PSLE Math

[ck123]

Hi


How many digits are there from 1-99?

Thanks

[tianzhu]

ck123:

Hi


How many digits are there from 1-99?

Thanks

Hi

Page 1 to page 9 ------- 9 digits
Page 10 to page 99 ------- (99-10) + 1 -------90 pages ------- 90*2 ------- 180 digits

Number of digits -------189.

Best wishes

[shruthi]

R and D had $1250 altogether.After R spent 80% and D spent 40%,D had twice as much money left as R.Find the amount of money D had in the end.

[shruthi]

J takes 6 hours to paint a house.If D helps him,they would take 4 hours.How long will D take to paint the house himself?

[ck123]

Thanks tianzhu

[shruthi]

Tony is 38 years old.Kelly is 22 years old.How many years ago was Kellys age 1/3 of Tonys age?

[shruthi]

J and E each have some marbles.If J gives 36 marbles to E,both of them will have the same number of marbles.If E gives 12 marbles to J,the number of marbles that J has to the number of marbles E has will be in the ratio 5:1.How many marbles does each girl have?

[Mvm]

shruthi:

Tony is 38 years old.Kelly is 22 years old.How many years ago was Kellys age 1/3 of Tonys age?

14 years ago k will be 22-14=8 t was 38-14=24
8 is 1/3 of 24.

And: 14 years ago.

[tianzhu]

Verysuperkiasu:

Thank you so very much!!!

Hi

Good Morning.

You're welcome.

Best wishes

[tianzhu]

ck123:

Thanks tianzhu

Hi

Good Morning.

You're welcome.

Best wishes