1. Natural wonders of the world (are spoken about) in the programme "Discovery. (Present Simple) .
2. Films about nature (will be shown) on this channel. (Futures simple).
3. Sharon (will be given) a chance to travel to Lake Baikal. (Future simple).
4. Loch Ness monster (was seen) by the Scottish Saint Columbia in the 5th century.
5. Lake Baikal (was formed) 30 million years ago.
6. These photos (were taken) by my brother when he travelled to Siberia.
7. Little (was known) about the north of our country three centuries ago.
8. First maps (were made) by travellers in the ancient times.
9. New plants and animals (are found) in nature every year.
10. Kamchatka national parks (are protected) by UNESCO.
НОК(24;32)=2*2*2*2*2*3=96;
24=2*2*2*3; 32=2*2*2*2*2
НОК(6;13)=2*3*13=78;
6=2*3;13=13*1
НОК(28;42)=2*2*7*3=84;
28=2*2*7;42=2*3*7
НОК(12)=3*2*2=12;
НОК(30;75)=2*3*5*5=150;
30=2*3*5;75=5*3*5