(1) On the 1st of Jan this year, Edu-kingdom puts 160 cents in a piggy bank. Every year, the amount which is put in the bank is doubled. If there is $49.60 in the Edu-kingdom bank account, how many years has it been since the first deposit has been made ?
Ans : 4
(2) Travelling by train from location A to B, I passed a sign saying "Location B - 280 km". After 18 more kilometres, I passed another sign saying "Location A 172 kilometres". How far is it by train from location A to B ?
Ans : 434km
(3) The pages of a book are numbered, 1,2,3.....In total, it takes 852 digist to number all the pages of the book. What is the number of the last page ?
Ans : 320
(4) Suppose that x is an odd integer, and that the sum .. (Anyone can help on this..as in how do i show a grade 5 the simple way to get the answer x ?
1 + 3 + 5 + 7 + ....+ (x-2) + x = 400.
What is x ?
Ans : 39
Appreciate your help.
Ans : 4
(2) Travelling by train from location A to B, I passed a sign saying "Location B - 280 km". After 18 more kilometres, I passed another sign saying "Location A 172 kilometres". How far is it by train from location A to B ?
Ans : 434km
(3) The pages of a book are numbered, 1,2,3.....In total, it takes 852 digist to number all the pages of the book. What is the number of the last page ?
Ans : 320
(4) Suppose that x is an odd integer, and that the sum .. (Anyone can help on this..as in how do i show a grade 5 the simple way to get the answer x ?
1 + 3 + 5 + 7 + ....+ (x-2) + x = 400.
What is x ?
Ans : 39
Appreciate your help.