The phrase "ambitious number" is correct and usable in written English.
It can be used to describe a number that is considered challenging or aspirational, often in contexts like goals, targets, or estimates.
Example: "The team set an ambitious number for their sales target this quarter, aiming to increase revenue by 30%."
Alternatives: "aspirational figure" or "challenging target".
Airbus, they said, set a goal of 1,500 planes for the A380 -- an ambitious number that people at Boeing doubt it will ever achieve.
Assailed by pains, possibly of psychosomatic origin, he began to drink heavily, abuse various drugs, and entertain an ambitious number of women.
They find value in delivering a so-called bolstering range offer, one that includes the single-figure offer you might plan to make at one end and a more ambitious number at the other end.
It's been a controversial mark of Martin's leadership that he has refused to let NYCB fossilise into a museum of past treasures, and has added an ambitious number of new works.
LONDON — When the Tate Modern opened its sleek glass doors in May 2000, its directors and curators expected around two million people in the first year — an ambitious number for a contemporary art museum.
The most ambitious number, "Dance Medley," strung together five standards about ballroom dancing to tell a story of a woman longingly contemplating an ex-lover on a dance floor, getting her turn with him and reasserting her abject passion.
They are ambitious numbers guys who made their mark fairly early in their careers.
"I think they were ambitious numbers," Charles Brecher, research director at the Citizens Budget Commission, said of the mayor's anticipated aid figures.
Both were young, hard-working and ambitious numbers guys with an appetite for deals and a desire to strike it rich as soon as possible, people who know both men say.
After spending several weeks visiting legions of Chinese innovators — entrepreneurs, companies, educational institutions and government officials — I believe that these ambitious numbers will be reached.
About one month into his role as RecycleBank's new CEO, Jonathan Hsu is rattling off some ambitious numbers: An IPO by 2013, plans to grow his staff from 150 to over a thousand by 2012, and to reach nine-figures in annual revenues in that same year.
