Skill Challenges Missing from Guide

[fortheloveofcake]

I was doing some research for a Dynasty on the Guide, and noticed that the Skill Journal Challenges for Gardening, Handiness, and Painting are not listed in the guide. Some of the other skills have a link leading to the Challenges info, if these 3 skills have a similar link it's very well hidden as I have not been able to find it.
Here is a direct quote with all the Challenge Info from the Sims 3 Wiki:

Gardening

Master Planter
A Master Planter must plant 19 types of plant that can be planted in the game. Once you have mastered the varieties you will be able to reduce weed growth significantly on future plants.
Botanical Boss
Botanical Bosses must harvest at least 75 Perfect fruits and vegetables. After so many Perfect harvastables, the plants of Botanical Bosses almost never die from neglect.
Master Farmer
Master Farmers have harvested at least 650 fruits and vegetables. The plants of Master Farmers remain watered and fertilized longer, meaning their gardens are more efficient

Handiness

Electrician
Electricians have repaired at least 10 electrical objects. The experience gained means they will never be electrocuted by an electrical object again.
Plumber
Plumbers have repaired at least 10 plumbing objects. They are so good at repairs that plumbing objects repaired by them never break again.
Tinkerer
Tinkerers have finished at least 10 unique upgrades on household items. Installing the "Unbreakable" upgrade on multiple objects only counts as one unique upgrade, so it helps to experiment with different upgrade options! Tinkerers never fail when upgrading objects.

Painting

Brushmaster
Brushmasters have painted at least 30 paintings, and as a result, paint much faster than normal painters.
Proficient Painters
Proficient Painters have proven their worth by painting at least 6 brilliant paintings. They tend to paint far more brilliant paintings and masterpieces than less proficient Sims.
Master Painter
Master Painters have painted at least 5 masterpieces. Every painting they sell is worth oodles more than the work of normal artists.

[mtglady]

The three skills you listed were probably the first ones written for this guide.  The Handiness Challenge Information is listed but is somewhat hidden within the paragraph below.   You can find this paragraph here to the left of the scorched Sim almost at the bottom of page.

There are three Handiness challenges. The first is to repair ten plumbing objects, such as sinks. This will give you the plumber challenge award, which makes plumbing unbreakable. A perfect opportunity to use self-cleaning. Additionally, once you've repaired ten electrical objects you'll complete the electrician challenge and never get shocked again. Lastly, complete the tinkerer challenge by doing ten of the upgrades above. This makes you never fail to upgrade, which seems pointless with the handy trait.

I'll send a PM to Carl to see of he wants to update those other two skills with the information you listed.  Thank you for bringing this to our attention.