-fold vs ... times

Fill in the blank with the most appropriate answer:

There was a _______ increase in the number of unemployed people between 2005 and 2009.

• two-fold

• twice

• two times

Fill in the blank with the most appropriate answer:

Car price has increased _____ in the years between 2001 and 2010.

• threefold

• three times

• three-fold

• by three times

Fill in the blank with the most suitable answer:

The company’s profits increased by _____ last year.

• ten times

• tenth

• ten-fold

• ten

Fill in the blank with the most suitable answer:

The number of immigrants in Europe in 2001 was ........ that in 1976.

• five times

• fifth

• five-fold

• five fold

Fill in the blank with the most suitable answer:

Reasons are ______: these countries have large and ailing pay-as-you-go public pension systems, relatively thin capital markets and less than benchmark capital performance.

• three times

• threefold

• three times higher

• three-fold

Fill in the blank with the most suitable answer:

The amount of rain in 1991 is __________ less than that in 1978.

• three times

• threefold

• treble

• three-fold

Fill in the blank with the correct answer:

the number of sprouts in this variant was ______ higher than in the non-treated control.

• 4.5 times

• 4.5-fold

Fill in the blank:

Building A is ________ higher than the tallest tree in the area.

• by six times

• sixfold

• six times

• sixth

Choose the incorrect statement:

• "fold" only goes with integers, not decimals.

• a fivefold increase = increase five times

• "times" is more commonly used than "fold" in the U.S. and in spoken English.

• "fold" and "times" are similar in meaning.