Los números/numbers

Fill in the missing 'número' in the following sequence: "uno, ?, tres, cuatro..."

Count down to supply the missing 'número':

"diez, nueve, ?, siete, seis..."

'Cuenta' by tens to input the missing 'número':

"veinte, treinta, ? , cincuenta, sesenta..."

The 'número' cien represents...

The Spanish letter 'y' 'representa' what in the following phrase: noventa y ocho?

Counting by twos, choose the appropriate missing 'número' in the following sequence: "dos, cuatro, ? , ocho, diez..."

Counting by threes, choose the appropriate missing 'número' in the following sequence: "tres, seis, nueve, ? , quince..."

Counting by fives, choose the correct missing 'número' in the following sequence: "cinco, diez, quince, ? , veinticinco, treinta..."

treinta + veintiuno

noventa y nueve - cincuenta y cinco