Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 31 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Ananya bought 3 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹65 (c) not enough info (d) ₹180
2. 2.🧩 Nisha bought 2 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹80 (b) ₹40 (c) ₹45 (d) not enough info
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Nisha is 7 years old. Arjun is 3 years older than Nisha. How old is Arjun? (a) not enough info (b) 3 (c) 10 (d) 11
7. 7.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
8. 8.🧩 Vihaan bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹120 (c) ₹65 (d) ₹60
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
10. 10.🧩 A box has 3 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 36 (b) not enough info (c) 27 (d) 12
11. 11.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
12. 12.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
13. 13.🧩 Kabir is 7 years old. Tara is older than Kabir. How old is Tara? (a) 8 (b) 9 (c) not enough info (d) 12
14. 14.🧩 Ananya is 12 years old. Kabir is older than Ananya. How old is Kabir? (a) not enough info (b) 17 (c) 14 (d) 13
15. 15.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) not enough info (b) 50 (c) 10 (d) 5
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
17. 17.🧩 Ishaan is 10 years old. Saanvi is older than Ishaan. How old is Saanvi? (a) 15 (b) not enough info (c) 12 (d) 11
18. 18.🧩 Ishaan is 7 years old. Kabir is 7 years older than Ishaan. How old is Kabir? (a) 15 (b) not enough info (c) 7 (d) 14
19. 19.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
20. 20.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 20 (b) 25 (c) 9 (d) not enough info
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
22. 22.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 3 PM
23. 23.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
24. 24.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) 6 PM (d) not enough info
25. 25.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
26. 26.🧩 Nisha is 11 years old. Tara is 3 years older than Nisha. How old is Tara? (a) 15 (b) not enough info (c) 3 (d) 14
27. 27.🧩 Ananya is 9 years old. Vihaan is 7 years older than Ananya. How old is Vihaan? (a) 17 (b) 7 (c) 16 (d) not enough info
28. 28.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
29. 29.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
30. 30.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
31. 31.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
32. 32.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
33. 33.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
34. 34.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Arjun is 8 years old. Rohan is older than Arjun. How old is Rohan? (a) 9 (b) 10 (c) not enough info (d) 13
36. 36.🧩 Aarav bought 3 balls for ₹45 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹15 (c) ₹45 (d) not enough info
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
38. 38.🧩 Arjun is 11 years old. Aarav is 9 years older than Arjun. How old is Aarav? (a) 9 (b) 20 (c) not enough info (d) 21
39. 39.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
40. 40.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence

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