Learn Turkish: Altmış bir çocuk şimdi hazır. - Sixty-one children are ready now.

To make a number like sixty-one, you just put the tens word and the units word side by side: altmış (sixty) plus bir (one). You never use a word for "and" between them.

Why is it çocuk (child) instead of the plural çocuklar (children)?

In Turkish, when you use a number greater than one before a noun, the noun always stays in its singular form. You literally say "sixty-one child" (altmış bir çocuk). Adding the plural suffix -lar after a specific number is actually grammatically incorrect.

Where is the word for "are" in this sentence?

There isn't a separate word for "are" here! In Turkish, the "to be" verbs (am, is, are) do not exist as standalone words. Instead, they are usually added as a suffix or just implied by the structure. Because the subject acts as a third-person unit here, you can simply put the adjective hazır (ready) at the end of the sentence to mean "are ready."

Why is the time word şimdi (now) placed in the middle of the sentence?

Turkish sentences generally put the main action or state at the very end. A very common word order is Subject-Time-Predicate. So, the subject altmış bir çocuk comes first, the time şimdi comes next, and the describing word hazır finishes the sentence.